And the explanation of the evidence that there is no fixed amount for charity given to a poor person, but he should be given as much as will remove his poverty.

Sayyiduna Qabeesah (may Allah be pleased with him) narrates that I came to the service of the Messenger of Allah (peace be upon him) so that he may help me in paying off blood money. So he said: "Stay with us; either we will pay all your blood money or we will assist you in it. And know well, asking (for help) is only permissible for three types of people. One is the person who takes the responsibility of blood money or compensation for a people, so he can ask for help in it until it is paid off, then he should stop asking. The second is the person who is struck by a calamity that destroys all his wealth, so he can ask until he gets enough to sustain himself. The third is the person who is afflicted by poverty and three wise or trustworthy men from his people testify that he is facing poverty, then it is permissible for him to ask until he gets enough to sustain himself, then he should stop. Other than this, asking is unlawful. O Qabeesah, anyone who asks beyond this will be consuming what is unlawful." This narration is from Janab Ath-Thaqafi.